Actually I do like visual metronomes, I have a racktuner which does the pendulum swinging type display and it's much easier to follow than a click alone. I tend to think it'd be really disconcerting though having something telling you how fast you were playing, rather than just how fast to play. Dunno, probably shouldn't knock it until I've tried it, but then again with a name like 'shredometer' I wouldn't be seen dead with the thing!
